JPH02947Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application fields] This invention is applicable to RF modulators, TV tuners, FM
Regarding cases for high frequency equipment such as tuners.

[Conventional technology]

1 to 3 are perspective views showing the case of a conventional RF modulator.

In the case for high-frequency equipment shown in FIG. 1, the four sides 1a, 1b, 1c, and 1d of the frame 1 are
is formed, and an input/output plug 2 is provided on one side surface 1d. Further, a circuit board 3 is fixed within the frame 1. A shield plate 4 is provided to shield circuit components mounted on this circuit board 3. This shield plate 4
is bent into an L shape by a metal plate separate from the frame 1, and projections 4a and 4b are integrally formed at the lower end thereof. Further, the circuit board 3 is provided with mounting holes 3a and 3b. The protrusions 4a, 4b of the shield plate 4 are inserted into the mounting holes 3a, 3b, and are fixed by soldering to the wiring pattern on the back surface of the circuit board 3.

In addition, in the conventional example shown in FIG.
a, 1b, 1c, and 1d are connected by a connecting surface 1e and bent. And 2 sides 1
Shield plate 1 is connected to c and 1d through connection surface 1g.
f is bent and formed integrally with the frame 1. A projection 1h formed on the lower surface of the shield plate 1f is inserted into a mounting hole 3c of the circuit board 3.

Furthermore, in the conventional example shown in FIG. 3, the inside of the frame 1, which has almost the same structure as that shown in FIG.
It is complicatedly partitioned by 6. The shield plates 5 and 6 are formed from a metal plate separate from the frame 1, as shown in FIG. One shield plate 5 has a U-shape, and the other shield plate 6 has a flat plate shape, and the lower end of the shield plate 5 has protrusions 5a, 5b, and 5c, and the lower end of the shield plate 6 has a protrusion 6a. is formed. The respective protrusions 5a to 5c and 6a are attached to mounting holes 3d, 3e, and 3f formed in the circuit board 3 within the frame 1.
and 3g, and is soldered to the wiring pattern on the back surface of the circuit board 3.

[Problems with conventional technology]

However, among the above conventional examples, Fig. 1 and Fig. 3
The one shown in the figure has shield plates 4, 5, and 6 attached to the frame 1.
Since it is provided separately, there are a large number of parts and the assembly work is complicated. In addition, in the one shown in FIG. 2, the shield plate 1f is formed integrally with the frame 1, but since the shield plate 1f does not have a bent surface formed on its upper edge, its strength is weak. Furthermore, the structure shown in FIG. 2 has the disadvantage that the shield plate 1f cannot be formed at any position. For example, it is difficult to install the shield plate at the position shown by the dashed line in FIG.

The present invention was developed by focusing on the above-mentioned conventional problems, and allows the shield plate to be formed at any position within the frame while forming the frame body and the shield plate from a single metal plate. Moreover, it is an object of the present invention to provide a case for high-frequency equipment in which the strength of the frame and the shield plate is increased.

[Means for solving problems]

The case for high-frequency equipment according to the present invention is made by punching out a single metal plate and using the remaining plate parts to integrally form a frame body consisting of four side plates and a shield plate that partitions the inside of this frame body. In the case for high-frequency equipment, the plate portion forms a first connection piece including an L-shaped plane, the side plate is bent at a right angle from the first connection piece, and the edges of the bent side plate meet each other. are joined to each other at the corner portions of the L-shape of the connection piece, and further a second connection piece is provided which is continuous in plane with the first connection piece via the L-shape, and this second The shield plate is formed by bending the connecting piece at right angles, and the edge of the shield plate is joined to the side plate at the corner of the L-shape. be.

[Effect]

In the above means, the four side plates and the shield plate are integrally formed of the same plate material. In addition, the side plate is reinforced by the first connecting piece having an L-shaped flat part, and the side plate and the shield plate are connected by the second connecting piece having an L-shaped flat part. The bent part with the plate is reinforced, making it possible to obtain a case with high strength. Further, since each of the above connection pieces comes into close contact with the cover, the shielding performance of the entire case can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. 5 and the following drawings.

FIG. 5 is a perspective view of a high frequency equipment case according to the first embodiment of the present invention, and FIG. 6 is a developed view of the frame 10 used in the high frequency equipment case of FIG.

The frame body 10 is composed of four side plates 11, 12, 13, and 14, and a circuit board 20 is provided within the frame body 10. In addition, this circuit board 2
Four shield plates 15, 16,
17 and 18 are provided. These four shield plates 15 to 18 are punched together with the frame 10 from a single metal plate into the shape shown in the developed view in FIG. It is what was done. There are protrusions 1 on both ends of the side plate 11.
1a and 11b are formed, and protrusions 12a and 12b are formed at both ends of the side plate 12. Furthermore, a recess 13a and a recess 13b are formed at both ends of the side plate 13, and a recess 14a and a recess 14b are formed at both ends of the side plate 14. With each side plate 11 to 14 bent at right angles, the protrusion 11a and the recess 13
a, protrusion 11b, recess 14a, and protrusion 12
a and the recess 14b, and the protrusion 12b and the recess 13b, and each protrusion and recess are fixed by caulking, etc.
The side plates 11 and 13, the side plates 12 and 13, the side plates 11 and 14, and the side plates 12 and 14 are fixed to each other. Furthermore, as a result of bending each side plate, connection pieces 10a having a constant width are formed at the upper end of the side plate 11 and at the upper end of a portion of the side plate 13. The connecting piece 10a includes an L-shaped flat portion located at a corner of the case. In addition, the upper end of the side plate 12,
A connection piece 10 including a frame-like L-shaped plane part is provided at a part of the upper end of the side plate 13 and a part of the upper end of the side plate 14.
b is formed.

On the other hand, as shown in FIG. 6, the shield plate 15,
16, 17 and 18 are stamped and formed inside the frame 10. A protrusion 15a and a protrusion 15b are formed on the shield plate 15, and the shield plate 16
A protrusion 16a and a recess 16b are formed therein.
Similarly, the shield plate 17 has protrusions 17a and 17b, and the shield plate 18 has protrusions 18a and 18a.
8b and 18c are formed respectively. On the other hand, a groove 13c is formed in the side plate 13 of the frame 10, and a groove 14c and a groove 14d are formed in the side plate 14. With each shield plate 15, 16, 17, 18 bent along the dotted lines shown in FIG.
3c, and the projections 17a and 18b are fitted into the grooves 14c and 14d of the side plate 14. In addition, the protrusion 18a
and fit into the recess 16b. As a result, the three-dimensional shield plate section shown in FIG. 5 is constructed. Furthermore, a connecting piece 10c having a constant width is left unfolded at the upper end of the shield plate 15. This connecting piece 10c is L
It is continuous with the connecting piece 10b via the letter-shaped flat part. Similarly, shield plates 16, 17, 1
8 and the top surface of the side plate 14 have a frame-shaped connection piece 1.
0d is left unfolded. Further, the circuit board 20 is inserted into the frame 10 from below in FIG.
0c, 20d are formed, the protrusion 15b of the shield plate 15 is fitted into the groove 20a, and similarly the protrusion 16a, 16a is fitted into the groove 20b, 20c, 20d.
7b and 18c are fitted. Further, a hole 13d is formed in the side plate 13, and holes 14e, 1 are formed in the side plate 14.
4f and 14g are formed. These holes 13
d, 14e to 14g are used for attaching input/output connectors or for adjusting the tuning axis.

In the case for high frequency equipment according to the above embodiment,
The frame body 10 and each of the shield plates 15 to 18 are integrally formed by punching out a single metal plate and bending the remaining plate, thereby reducing the number of parts and simplifying assembly work. Become. Moreover, since each of the shield plates 15 to 18 is stamped and formed within the frame 10, it becomes possible to arrange each of the shield plates 15 to 18 freely within the frame 10. Furthermore, each side plate 11 to 14 of the frame body 10,
Each side plate 13 and 14 each shield plate 15 and 1
8 and each shield plate 15 and 16
The L of each connection piece 10a to 10d is
Since they are joined together at the corners of the letters,
These L-shaped portions reinforce the respective joint portions.

Next, FIG. 7 shows a second embodiment. This embodiment is shown with the opening surface B facing upward, similar to FIG. 5. Frame 10 and each shield plate 15, 16, 1 in this embodiment
The molding of parts 7 and 18 is carried out by the same punching method as in the developed view of FIG. Two notches α are formed in the connecting piece 10c at the upper end of the shield plate 15 in the frame 10, and a contact surface 15e sandwiched between the notches α is provided in a part of the connecting piece 10c. ing. Similarly, shield plates 16, 17, 18
The connection piece 10d on the upper end of the frame also has a notch α of 6
Contact surfaces 16f, 17e, and 18g are formed between the notches α.
These contact surfaces 15e, 16f, 17e, 18g
Due to the presence of the notch α, the height can be freely set, such as making it lower than the connecting pieces 10a and 10b around the frame 10. On the other hand, the upper opening surface B of the frame 10 is covered by an upper cover 25. This upper cover 21 is formed by bending a sheet metal. Three crimp pieces 25a are provided on each of the two opposing sides of the upper cover 25, and right-angled bent pieces 25b are formed on the other two sides. At the center of the upper cover 25, there are a plurality of contact pieces 26a, 26b, 26c, facing toward the frame 10.
26d is bent and formed. These contact pieces 26a, 26b, 26c, and 26d are formed by cutting out a part of the upper cover 25 and bending the plate of that part downward in the figure. Upper cover 2
5 to the upper opening surface B of the frame 10,
Each bent piece 25b is brought into contact with the outside of the side plates 13 and 14 of the frame 10, and each crimp piece 25a is brought into contact with the outside of the side plates 13 and 14 of the frame 10.
Press to the outside of 1 and 12. At this time, the contact piece 26a contacts the connection piece 15e, and similarly, the contact pieces 26b, 26c, 26d contact the contact surfaces 16f, 1, respectively.
Contact 7e and 18g. This contact piece 26a, 2
6b, 26c, 26d and contact surfaces 15e, 16f,
Due to contact with 17e and 18g, the upper cover 25
The shield plates 15, 16, 17, and 18 are completely electrically connected, and the upper cover 25 and the frame 10
This prevents poor contact between the In particular, in the embodiment of FIG. 7, the contact surfaces 15e, 16f, 17e, 1
The height of each contact piece 26 can be changed freely.
A, 26b, 26c, and 26d can be set in an optimal state according to the characteristics at the time of molding, and a good contact state can be obtained.

FIG. 8 shows the third implementation column. In this embodiment, the connecting piece 10 at the upper end of the shield plate 15
wide notches β are formed in the connecting pieces 10d at the upper ends of the shield plates 16, 17, and 18.
Due to the existence of this wide notch β, the contact area between the connecting piece 10c and the connecting piece 10d with respect to the upper cover covering the upper opening surface B is minimized, and contact failure may occur due to deformation during molding of the upper cover, etc. is less likely to occur.

〔effect〕

As described above, according to the present invention, the frame body and the shield plate are integrally molded by punching out a single metal plate and bending the remaining plate, reducing the number of parts and simplifying assembly work. It can be simplified, and the mutual positional accuracy is higher than when separate parts are combined, resulting in better quality. Further, since the shield plate is punched and formed within the frame, it is possible to freely arrange the shield plate within the frame. Furthermore, since the side plates and the side plates and the shield plates are respectively joined to each other at the L-shaped corners of the first and second connecting pieces, these L-shaped parts reinforce the respective joint parts. Become so. In addition, since the first connection piece and the second connection piece having an L-shaped flat part are located in the opening of the case, when the cover is attached to the opening, each of the connection pieces The shielding performance of the entire case is improved by the close contact between the case and the cover.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are perspective views showing the frame of a conventional high-frequency equipment case; Figure 4 is an exploded perspective view showing the structure of a conventional shield plate; 5 is a perspective view showing a first embodiment of the frame, FIG. 6 is a developed view of the frame shown in FIG. 5, and FIG. 7 is a second embodiment. FIG. 8 is a perspective view showing the frame according to the third embodiment. 10... Frame body, 11, 12, 13, 14... 4 side plates of the frame body, 15, 16, 17, 18... Shield plate, 10a, 10b... Connection piece at the upper end of the side plate, 1
0c, 10d... Connection piece at the upper end of the shield plate, 20
...Circuit board, 25...Top cover.

Claims (1)

[Scope of utility model registration request] In a case for high-frequency equipment, in which a frame body consisting of four side plates and a shield plate partitioning the inside of this frame body are integrally formed by punching out a single metal plate and using the remaining plate portion, the plate a first connecting piece including an L-shaped plane is formed by the portion, and the side plate is bent at a right angle from the first connecting piece;
The edges of the bent side plates are joined to each other at the corner of the L-shape of the connection piece, and further a second connection is continuous with the first connection piece in a plane via the L-shape. a second connecting piece is provided and bent at right angles from the second connecting piece to form the shield plate, the edge of which is connected to the L.
A case for high frequency equipment, characterized in that the case is joined to the side plate at a corner of the character.